Examples of com.hp.hpl.jena.sparql.algebra.optimize.TransformTopN

Package com.hp.hpl.jena.sparql.algebra.optimize

Examples of com.hp.hpl.jena.sparql.algebra.optimize.TransformTopN

com.hp.hpl.jena.sparql.algebra.optimize.TransformTopN
Optimization that changes queries that uses OFFSET/LIMIT and ORDER BY to execute using Top N: i.e. while executing, keep only the top N items seen. This avoids full sort of the whole results, saving space and time.

            ,"      (bgp (triple ?s ?p ?o)))))"
            );        testQuery("SELECT ?s { ?s ?p ?o } ORDER BY ?p ?o OFFSET 1 LIMIT 5", output);
    }


    private void test(String input, String output) {
        Transform transform = new TransformTopN() ;
        testOp(input, transform, output) ;
    }

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    }


    // ---- From query to transfomed algebra.
    
    private void testQuery(String input, String output) {
        Transform transform = new TransformTopN() ;
        testQuery(input, transform, output) ;
    }

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Related Classes of com.hp.hpl.jena.sparql.algebra.optimize.TransformTopN

com.hp.hpl.jena.sparql.algebra.Op

com.hp.hpl.jena.sparql.algebra.op.OpOrder

com.hp.hpl.jena.sparql.algebra.op.OpProject

com.hp.hpl.jena.sparql.algebra.op.OpSlice

com.hp.hpl.jena.sparql.algebra.op.OpTopN

com.hp.hpl.jena.sparql.algebra.optimize.TestTransformTopN

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